// SPDX-License-Identifier: GPL-2.0
/*
 * PCMCIA driver for SL811HS (as found in REX-CFU1U)
 * Filename: sl811_cs.c
 * Author:   Yukio Yamamoto
 *
 *  Port to sl811-hcd and 2.6.x by
 *    Botond Botyanszki <boti@rocketmail.com>
 *    Simon Pickering
 *
 *  Last update: 2005-05-12
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>

#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>

#include <linux/usb/sl811.h>

MODULE_AUTHOR("Botond Botyanszki");
MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
MODULE_LICENSE("GPL");


/*====================================================================*/
/* MACROS                                                             */
/*====================================================================*/

#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)

/*====================================================================*/
/* VARIABLES                                                          */
/*====================================================================*/

typedef struct local_info_t {
        struct pcmcia_device    *p_dev;
} local_info_t;

static void sl811_cs_release(struct pcmcia_device * link);

/*====================================================================*/

static void release_platform_dev(struct device * dev)
{
        dev_dbg(dev, "sl811_cs platform_dev release\n");
        dev->parent = NULL;
}

static struct sl811_platform_data platform_data = {
        .potpg          = 100,
        .power          = 50,           /* == 100mA */
        // .reset       = ... FIXME:  invoke CF reset on the card
};

static struct resource resources[] = {
        [0] = {
                .flags  = IORESOURCE_IRQ,
        },
        [1] = {
                // .name   = "address",
                .flags  = IORESOURCE_IO,
        },
        [2] = {
                // .name   = "data",
                .flags  = IORESOURCE_IO,
        },
};

extern struct platform_driver sl811h_driver;

static struct platform_device platform_dev = {
        .id                     = -1,
        .dev = {
                .platform_data = &platform_data,
                .release       = release_platform_dev,
        },
        .resource               = resources,
        .num_resources          = ARRAY_SIZE(resources),
};

static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
                         int irq)
{
        if (platform_dev.dev.parent)
                return -EBUSY;
        platform_dev.dev.parent = parent;

        /* finish setting up the platform device */
        resources[0].start = irq;

        resources[1].start = base_addr;
        resources[1].end = base_addr;

        resources[2].start = base_addr + 1;
        resources[2].end   = base_addr + 1;

        /* The driver core will probe for us.  We know sl811-hcd has been
         * initialized already because of the link order dependency created
         * by referencing "sl811h_driver".
         */
        platform_dev.name = sl811h_driver.driver.name;
        return platform_device_register(&platform_dev);
}

/*====================================================================*/

static void sl811_cs_detach(struct pcmcia_device *link)
{
        dev_dbg(&link->dev, "sl811_cs_detach\n");

        sl811_cs_release(link);

        /* This points to the parent local_info_t struct */
        kfree(link->priv);
}

static void sl811_cs_release(struct pcmcia_device * link)
{
        dev_dbg(&link->dev, "sl811_cs_release\n");

        pcmcia_disable_device(link);
        platform_device_unregister(&platform_dev);
}

static int sl811_cs_config_check(struct pcmcia_device *p_dev, void *priv_data)
{
        if (p_dev->config_index == 0)
                return -EINVAL;

        return pcmcia_request_io(p_dev);
}


static int sl811_cs_config(struct pcmcia_device *link)
{
        struct device           *parent = &link->dev;
        int                     ret;

        dev_dbg(&link->dev, "sl811_cs_config\n");

        link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
                CONF_AUTO_CHECK_VCC | CONF_AUTO_SET_IO;

        if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
                goto failed;

        /* require an IRQ and two registers */
        if (resource_size(link->resource[0]) < 2)
                goto failed;

        if (!link->irq)
                goto failed;

        ret = pcmcia_enable_device(link);
        if (ret)
                goto failed;

        if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
                        < 0) {
failed:
                printk(KERN_WARNING "sl811_cs_config failed\n");
                sl811_cs_release(link);
                return  -ENODEV;
        }
        return 0;
}

static int sl811_cs_probe(struct pcmcia_device *link)
{
        local_info_t *local;

        local = kzalloc_obj(local_info_t);
        if (!local)
                return -ENOMEM;
        local->p_dev = link;
        link->priv = local;

        return sl811_cs_config(link);
}

static const struct pcmcia_device_id sl811_ids[] = {
        PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
        PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, sl811_ids);

static struct pcmcia_driver sl811_cs_driver = {
        .owner          = THIS_MODULE,
        .name           = "sl811_cs",
        .probe          = sl811_cs_probe,
        .remove         = sl811_cs_detach,
        .id_table       = sl811_ids,
};
module_pcmcia_driver(sl811_cs_driver);